<?php
/**
 * Smarty plugin
 * @package Smarty
 * @subpackage plugins
 */

/**
 * Load requested plugins
 *
 * @param array $plugins
 */

// $plugins

function smarty_core_load_plugins($params, &$smarty)
{

	foreach ($params['plugins'] as $_plugin_info) {
		list($_type, $_name, $_tpl_file, $_tpl_line, $_delayed_loading) = $_plugin_info;
		$_plugin = &$smarty->_plugins[$_type][$_name];

		/*
		 * We do not load plugin more than once for each instance of Smarty.
		 * The following code checks for that. The plugin can also be
		 * registered dynamically at runtime, in which case template file
		 * and line number will be unknown, so we fill them in.
		 *
		 * The final element of the info array is a flag that indicates
		 * whether the dynamically registered plugin function has been
		 * checked for existence yet or not.
		 */
		if (isset($_plugin)) {
			if (empty($_plugin[3])) {
				if (!is_callable($_plugin[0])) {
					$smarty->_trigger_fatal_error("[plugin] $_type '$_name' is not implemented", $_tpl_file, $_tpl_line, __FILE__, __LINE__);
				} else {
					$_plugin[1] = $_tpl_file;
					$_plugin[2] = $_tpl_line;
					$_plugin[3] = true;
					if (!isset($_plugin[4])) $_plugin[4] = true; /* cacheable */
				}
			}
			continue;
		} else if ($_type == 'insert') {
			/*
			 * For backwards compatibility, we check for insert functions in
			 * the symbol table before trying to load them as a plugin.
			 */
			$_plugin_func = 'insert_' . $_name;
			if (function_exists($_plugin_func)) {
				$_plugin = array($_plugin_func, $_tpl_file, $_tpl_line, true, false);
				continue;
			}
		}

		$_plugin_file = $smarty->_get_plugin_filepath($_type, $_name);

		if (! $_found = ($_plugin_file != false)) {
			$_message = "could not load plugin file '$_type.$_name.php'\n";
		}

		/*
		 * If plugin file is found, it -must- provide the properly named
		 * plugin function. In case it doesn't, simply output the error and
		 * do not fall back on any other method.
		 */
		if ($_found) {
			include_once $_plugin_file;

			$_plugin_func = 'smarty_' . $_type . '_' . $_name;
			if (!function_exists($_plugin_func)) {
				$smarty->_trigger_fatal_error("[plugin] function $_plugin_func() not found in $_plugin_file", $_tpl_file, $_tpl_line, __FILE__, __LINE__);
				continue;
			}
		}
		/*
		 * In case of insert plugins, their code may be loaded later via
		 * 'script' attribute.
		 */
		else if ($_type == 'insert' && $_delayed_loading) {
			$_plugin_func = 'smarty_' . $_type . '_' . $_name;
			$_found = true;
		}

		/*
		 * Plugin specific processing and error checking.
		 */
		if (!$_found) {
			if ($_type == 'modifier') {
				/*
				 * In case modifier falls back on using PHP functions
				 * directly, we only allow those specified in the security
				 * context.
				 */
				if ($smarty->security && !in_array($_name, $smarty->security_settings['MODIFIER_FUNCS'])) {
					$_message = "(secure mode) modifier '$_name' is not allowed";
				} else {
					if (!function_exists($_name)) {
						$_message = "modifier '$_name' is not implemented";
					} else {
						$_plugin_func = $_name;
						$_found = true;
					}
				}
			} else if ($_type == 'function') {
				/*
				 * This is a catch-all situation.
				 */
				$_message = "unknown tag - '$_name'";
			}
		}

		if ($_found) {
			$smarty->_plugins[$_type][$_name] = array($_plugin_func, $_tpl_file, $_tpl_line, true, true);
		} else {
			// output error
			$smarty->_trigger_fatal_error('[plugin] ' . $_message, $_tpl_file, $_tpl_line, __FILE__, __LINE__);
		}
	}
}

/* vim: set expandtab: */

?>
